(19)
(11) EP 1 481 466 A1

(12)

(43) Date of publication:
01.12.2004 Bulletin 2004/49

(21) Application number: 02807001.9

(22) Date of filing: 30.12.2002
(51) International Patent Classification (IPC)7H02M 7/00
(86) International application number:
PCT/CN2002/000920
(87) International publication number:
WO 2003/075444 (12.09.2003 Gazette 2003/37)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 04.03.2002 US 86688

(71) Applicant: The University of Hong Kong
Hong Kong (CN)

(72) Inventors:
  • POON, Ngaikit Franki
    Kowloon,Hong Kong (CN)
  • PONG, Manhay
    South Horizons,Ap Lei Chau,Hong Kong (CN)
  • LIU, Chuipong Joe
    New Territories,Hong Kong (CN)

(74) Representative: Epping, Hermann, Fischer 
Patentanwaltsgesellschaft mbHRidlerstrasse 55
80339 München
80339 München (DE)

   


(54) AC-DC CONVERTER WITH LOW RIPPLE OUTPUT